參數(shù)資料
型號: LA70011M
元件分類: 音頻/視頻放大
英文描述: 4 CHANNEL, VIDEO PREAMPLIFIER, PDSO24
封裝: MFP-24
文件頁數(shù): 11/11頁
文件大小: 133K
代理商: LA70011M
Envelope Detector Characteristic: Pin 6
The LA70011 includes a built-in playback signal envelope detector circuit for use in automating tracking adjustment.
REC AMP Gain Control
The LA70011 eliminates recording current adjustment by adding an automatic gain control circuit to the recording
amplifier. It is also possible to change the recording current with the following methods.
REC-CURRENT-ADJ2 Open
The internal bias forces the DC level at pin 12 to 1/2 VCC (that is, approximately 2.5 V), and RO1 determines the
recording current.
Design values
RO1 = 1.5 k = 16.0 mA (SP) (per channel)
RO1 = 1.5 k =12.7 mA (EP)
REC-CURRENT-ADJ2 Used
Applying a DC control voltage between 1 and 4 V to pin 12 adjusts the figure determined by RO1 between –6.0 dB and
+3.5 dB.
No. 5710-9/11
LA70011, 70011M
REC-CURRENT
(mAp-p)
design
values
Pin 6 level - detector
DC level (V)
Pin 7 level - playback output level (mVp-p)
Envelope detector voltage characteristic
EP, with 18k
resistor on pin 6
SP, with 18k
resistor on pin 6
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